US11235070B2 - Nanoparticles comprising protein-polynucleotide complexes and for delivering protein based complexes - Google Patents
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Definitions
- the instant invention relates generally to the field of therapy using nanoparticles to deliver biologic agents. More specifically, the present invention relates to nanoparticles, methods of their manufacture, and methods of use for delivering biologic agents.
- Genome editing technologies have shown much potential in their ability to change the genetic code of cells. These technologies could enable novel insights in drug discovery and lead to the development of next generation gene therapies.
- CRISPR technology in which a targeting RNA (sgRNA) complexes with one or more CRISPR associated proteins such as Cas9 and directs the complex to the target where the nuclease activity of the Cas protein cuts the DNA.
- sgRNA targeting RNA
- RNA interference is also a powerful tool to silence or reduce the expression of a target gene and is mediated by small single- or double-stranded RNA molecules.
- These molecules such as siRNAs, miRNAs and shRNAs, are important intermediaries in the RNAi pathway that lead to degradation of specific mRNAs through the RNA-induced silencing complex (RISC).
- RISC RNA-induced silencing complex
- Ago2 protein Argonaute 2
- This strand guides RISC to its complementary target mRNA, which is finally cleaved by the RNase activity located in the Ago2 protein, triggering its destruction.
- Encapsulation of proteins is one of numerous protective strategies to improve delivery.
- protein encapsulation yields are often low, necessitating efforts to chemically stabilize the protein but which can also significantly denature the protein.
- protein encapsulation approaches often must be evaluated on an empirical, case-by-case basis, as the protective effects of solutes are variable.
- the instant invention is a composition of nanoparticles comprising a polynucleotide component, a protein component, a surfactant having an HLB value of less than 6.0 units, optionally a hydrophilic polymer, optionally a ligand, and optionally Li+ and Cs+, wherein:
- the instant invention comprises a method of making a nanoparticle of the present invention.
- the instant invention comprises a method of using the instant invention for example to treat a subject in need comprising administering a nanoparticle of the present invention to the subject where the protein component and polynucleotide component are designed to alter gene expression of a disease-relevant gene.
- FIG. 1 is a TEM micrograph for Formula Ha
- FIG. 2 is Silver-stained gel of supernatants from reaction mixtures
- FIG. 3 shows immunomicroscopy from RISC nanoparticles in 3D hepatocyte cultures
- FIG. 4 shows immunohistochemistry of mouse liver
- FIG. 5 shows immunohistochemistry in 3D hepatocyte cultures
- FIG. 6 shows FT-IR Scan for MilliQ Water
- FIG. 7 shows FT-IR Scan for Hepes 10% Lactitol hydrated
- FIG. 8 shows FT-IR Scan for Hepes 10% Lactitol partially dehydrated
- FIG. 9 shows FT-IR Scan (Li + Cs) Cl
- FIG. 10 shows FT-IR Scan for ASOR hydrated
- FIG. 11 shows FT-IR Scan for DMSO
- FIG. 11.5 shows TM-Diol Surfactant in 50% DMSO
- FIG. 12 shows FT-IR Scan for Ammonium Acetate Dried
- FIG. 13 shows FT-IR Scan for ASOR Sugar Nanocapsule hydrated
- FIG. 13-2 shows FT-IR Scan for ASOR Sugar Dried Only 2nd Run
- FIG. 14 shows FT-IR Scan for ASOR Sugar Nanocapsule dehydrated
- FIG. 15 shows FT-IR Scan for ASOR Sugar Micelle dehydrated
- FIG. 16 shows FT-IR Scan for ASOR RISC RNAi F7 Nanocapsule dehydrated
- FIG. 17 shows FT-IR Scan for ASOR RISC RNAi F7 Micelle
- FIG. 18 shows FT-IR Scan for ASOR RISC 2RF7 Micelle
- FIG. 19 shows FT-IR Scan for ASOR RNAi F7 Nanocapsule dehydrated
- FIG. 20 FT-IR Scan for ASOR RNAi F7 Micelle dehydrated
- FIG. 21 shows FT-IR Scan for ASOR Cas9 F7 Nanocapsule hydrated
- FIG. 22 shows FT-IR Scan for ASOR Cas9 F7 Nanocapsule dehydrated
- FIG. 23 shows FT-IR Scan for ASOR Cas9 Micelle dehydrated
- FIG. 24 shows FT-IR Scan for ASOR dCas9 F7 Nanocapsule dehydrated
- FIG. 25 shows FT-IR Scan for ASOR dCas9 Micelle dehydrated
- FIG. 26 shows FT-IR Scan of TBG Erythitol Nanocapsule hydrated
- FIG. 27 shows FT-IR Scan Tbg Erythritol Nanocapsule dehydrated
- FIG. 28 shows “short-release” (in vivo) CUSP-RNP particle DLS and TEM
- FIG. 29 shows CUSP RNP pilot study in mice
- FIG. 30 shows ASOR-coated CUSP-RNP for targeted liver therapy
- FIG. 31 shows CUSP-mediated RNP delivery into target cells via non-endosomal lipid raft path
- FIG. 32 shows cytokine levels of mice treated with CUSP-RNP at highest doses: fast+slow release particles;
- FIG. 33 shows transcript changes observed via qPCR for Group 10, but differed based on probe set design
- FIG. 34 shows CUSP RNP knocks down FVII protein in RNP pilot study in vivo
- FIG. 35A shows isotopic bio distribution study in mice, utilizing CUSP-encapsulated Dy-Dextran
- FIG. 35B shows co-localization of spCas9 protein cargo (blue) and immuno-labeled CUSP shell;
- FIG. 36 shows CUSP delivers RNP to nucleus
- FIG. 37 shows CUSP-RNP induces FVII transcript decrease as measured by in situ hybridization
- FIG. 38 shows CUSP dCas9 RNP shows FVII protein inhibition similar to CUSP Cas9 RNP in vitro
- FIG. 39 shows neither dCas9 or Cas9 species shows mutational activity by amplicon deep sequencing
- ASOR means asialoorosomucoid.
- AGO means Argonaute and refers to, by way of non-limiting examples, the mammalian Argonaute protein family currently known in the art to consist of eight members, four of which are ubiquitously expressed (Ago subfamily), with the remaining four (Piwi subfamily) being expressed in germ cells.
- Ago2 is useful in the instant invention in gene silencing independent of such cleavage activity, such as in translational repression.
- Argonaute can be an Aquifex aeolicus , a Microsystis aeruginosa , a Clostridium bartlettii , an Exiguobacterium , an Anoxybacillus flavithermus , a Halogeometricum borinquense , a Halorubrum lacusprofundi , an Aromatoleum aromaticum , a Thermus thermophilus , a Synechococcus , a Synechococcus elongatus , or a Thermosynechococcus elogatus Argonaute.
- Argonaute can be mammalian Argonaute, such as mouse AGO2.
- Argonaute can refer to the wild-type or a modified form of the Argonaute protein that can comprise an amino acid change such as a deletion, insertion, substitution, variant, mutation, fusion, chimera, or any combination thereof.
- the proteins referred to herein may also be identified by their NCBI accession numbers; Ago 1, NP-036331; Ago2, NP-036286, Ago3, NP-079128, and Ago4, NP-060099.
- Biologic agents of the instant invention are, by way of non-limiting example, gene editing agents, agents that affect or modulate transcription or translation, guided endonuclease machinery, or agents that cause other genetic or biochemical changes in a biologic system.
- Cas protein refers to CRISPR-associated proteins and by non-limiting examples, Cas9 proteins, Cas9-like proteins encoded by Cas9 orthologs, Cas9-like synthetic proteins, Cpf1 proteins, proteins encoded by Cpf1 orthologs, Cpf1-like synthetic proteins, C2c1 proteins, C2c2 proteins, C2c3 proteins, and variants and modifications thereof.
- a Cas protein is a Class 2 CRISPR-associated protein, for example a Class 2 Type II CRISPR-associated protein or a Class 2 Type V CRISPR-associated protein.
- Each CRISPR-Cas protein interacts with one or more cognate polynucleotide (typically RNA) to form a nucleoprotein complex (typically a ribonucleoprotein complex).
- Cas9 protein refers to a Cas9 wild-type protein derived from Type II CRISPR-Cas9 systems, modifications of Cas9 proteins, variants of Cas9 proteins, Cas9 orthologs, and combinations thereof.
- the term “dCas9” as used herein refers to variants of Cas9 protein that are nuclease-deactivated Cas9 proteins, also termed “catalytically inactive Cas9 protein,” or “enzymatically inactive Cas9.”
- Chimeric refers a molecule that is composed of both RNA and DNA moieties that are naturally occurring or nucleotide analogs, linked by phosphodiester, phosphorothioate, and/or any other naturally occurring or synthetic linkage that permits the nucleotides or analogs to retain their intended function.
- Cognate typically refers to a Cas protein and one or more Cas polynucleotides that are able of forming a nucleoprotein complex capable of site-directed binding to a target nucleic acid complementary to the target nucleic acid binding sequence present in one of the Cas polynucleotides.
- Cpf1 protein refers to a Cpf1 wild-type protein derived from Type V CRISPR-Cpf1 systems, modifications of Cpf1 proteins, variants of Cpf1 proteins, Cpf1 orthologs, and combinations thereof.
- dCpf1 refers to variants of Cpf1 protein that are nuclease-deactivated Cpf1 proteins, also termed “catalytically inactive Cpf1 protein”, or “enzymatically inactive Cpf1”.
- CRISPR means clustered regularly interspaced short palindromic repeats.
- dCas9 means endonuclease dead Cas9, also known as dead Cas9 and is a mutant form of Cas9 whose endonuclease activity is removed through point mutations in its endonuclease domains.
- DLS Dynamic Light Scattering and, in connection with data shown herein, means a Nicomp ZLS 380 instrument.
- Donor template DNA in reference to CRISPR technology or RISC technology or, means DNA that is configured to provide a template for DNA synthesis in regions that have been excised by CRISPR technology or RISC technology.
- DTT means dithiothreitol.
- Flag means FLAG-tag comprising the amino acid residues DYKDDDDK.
- fpm feet per minute
- Gene editing refers to the insertion, deletion or replacement of nucleic acids in genomic DNA so as to add, disrupt or modify the function of the product that is encoded by a gene.
- Guide strand refers to the single-stranded polynucleotide that comprises at least 12 nucleotides that binds to an Argonaute polypeptide or a related RISC complex and is capable of directing NP complex to a target polynucleotide.
- the guide molecule can be a DNA or an RNA or a chimeric molecule.
- the skilled artisan, with the teaching herein, is readily able to design the guide strand, typically optimizes for uniform hybridization energies across sequences at sites of low target mRNA secondary structure while siRNA design is more focused on optimizing a hybridization profile across the sequence within the context of sequence “rules”. Design algorithms such as Soligo for antisense and SiRNA for siRNA are publicly available.
- In concert means performing a biologic function together as part of a complex or physical association or interaction such as that which occurs in substrate-enzyme binding or other physicochemical interactions.
- Instant means, by way of non-limiting examples, when used as is “instant nanoparticles” or “instant ligands” means the nanoparticles or ligands of the present invention.
- NP means nucleoprotein complex which is a polynucleotide-protein complex.
- complexes are Cas-sgRNA, RISC, PNA, and SGN complexes.
- polynucleotide portion is an RNA species, although DNA-protein complexes and chimeric nucleic acid polymers are also contemplated here.
- PNA means Triplex-forming peptide nucleic acid oligomers.
- PNAs refer to complexes in which, by way of non-limiting example, the phosphate backbone of polynucleotides is replaced in its entirety by repeating N-(2-aminoethyl)-glycine units and phosphodiester bonds are replaced by peptide bonds.
- the various heterocyclic bases are linked to the backbone by methylene carbonyl bonds.
- PNAs maintain spacing of heterocyclic bases that are similar to polynucleotides, but are achiral and neutrally charged molecules.
- Peptide nucleic acids are comprised of peptide nucleic acid monomers.
- PNA complexes have a charge-neutral peptide-like backbone and nucleobases enabling hybridization with DNA and RNA with high affinity.
- PNA/DNA/PNA triplexes recruit the cell's endogenous DNA repair systems to initiate site-specific modification of the genome when single-stranded “donor template DNAs” are co-delivered as templates containing the desired sequence modification.
- This technology described by Rogers, et al., Proc. Natl. Acad. Sci. USA, 99:16695-16700 (2002) is also contemplated to be useful according to the present invention as taught by U.S. 20170283830. More recently, a review describing useful aspects of this technology has been published by Siddiquee et al. in Adv Tech Biol Med 2015, 3:2.
- Polynucleotide as used here, means a biopolymer composed of any number of nucleic acid monomer of deoxyribonucleic acid or ribonucleic acid and contemplates nature and modified or synthetic nucleic acid monomers.
- Polynucleotide components as used herein, means polynucleotides with the additional teaching set forth elsewhere herein.
- rAgo2 means recombinant protein argonaute-2.
- RISC as used herein means RNA-induced silencing complex and, by way of non-limiting example, a guide strand-AGO protein complex.
- RISC nanoparticles means the instant nanoparticles wherein the biologic agent is a RISC.
- RNAiF7 means a single stranded RNA polynucleotide complementary to Factor VII (i.e. a guide RNA).
- RNP means ribonucleic protein
- sgRNA-Cas nanoparticles means the instant nanoparticles wherein the biologic agent is an sgRNA-Cas nucleoprotein complex.
- siF7 means a double stranded siRNA complementary to Factor VII coding sequence.
- SGN means the structure-guided endonuclease gene editing technology, for example, where the protein component is a FEN-1 fusion (endonuclease) and where the polynucleotide is a guide DNA.
- the guide DNA can be about 20 to about 50 nucleotides.
- the gene editing function of SGN is described, for example, in Xu S, Cao S, Zou B, Yue Y, Gu C, Chen X, et al.
- An alternative novel tool for DNA editing without target sequence limitation the structure-guided nuclease (SGN). Genome Biol. 2016 and Varshney G K, Burgess S M. DNA-guided genome editing using structure-guided endonucleases. Genome Biology. 2016; 17:187. doi:10.1186/s13059-016-1055-4.
- sgRNA or gRNA means a single-guide RNA with about 20 nucleotides and directs Cas9 or dCas9 or other Cas proteins to their targets and together make up the whole or part of the CRISPR system.
- Biologic agents can be any Biologic agent that comprises a protein component comprising one or more proteins and a polynucleotide component, comprising one or more polynucleotides, where the biologic activity of the biologic agent requires at least the co-action of the protein component and the polynucleotide component.
- RISC RNA-induced silencing complexes
- ssRNA single-stranded RNA
- miRNA microRNA
- siRNA double-stranded small interfering RNA
- biologic agents are complexes between sgRNA and one or more CRISPR associated protein (“Cas”).
- Triplex-forming peptide nucleic acid oligomers are also examples.
- protein and polynucleotide component pairs (capable of forming a biologic agent) of the instant invention comprise one or more of:
- ssRNA single stranded RNA
- siRNA small interfering RNA
- microRNA microRNA
- Instant biologic agents are co-encapsulated according to the instant invention in a configuration that may or may not represent the configuration or complex structure that occurs in their physiologically-active state.
- RISC complexes and Cas-sgRNA complexes there is a specific interaction between the protein components and the polynucleotide components that dictate their coordinate action. Nevertheless, this complex not only co-delivers the protein components and the polynucleotide components, these components are delivered in immediate, physical proximity to one another and provide a means for efficient transition to an optimal configuration.
- nanoparticles are made with superior efficacy and loading.
- the complex formed between the protein components and the polynucleotide components in the instant nanoparticles is also referred to as a “biologic agent”.
- the biologic agent of the instant invention may be formed by complexing the protein components and the polynucleotide components by methods described below and further in the Examples. However, with the teaching herein, the skilled artisan will readily appreciate useful modifications of these methods.
- this complex is of the manner an aggregate, meaning a heterogeneous interaction involving different interactions ranging from specific, high affinity interaction to non-specific interactions.
- the complex is made of one or more specific interactions such as an enzyme binding to a substrate or a polymerase binding to a polynucleotide acid.
- the protein component is suspended in buffer (e.g. at about 1 to 70% w/w) and the polynucleotide component is added (e.g. by weight at 25-120% of protein component on a molar basis) in sufficient volume to maintain protein weight percent at or below 25% w/v for reaction.
- the polynucleotide and protein components are allowed to interact and complex by gentle mixing (e.g. about 3-8 minutes).
- the protein component and the polynucleotide component of the biologic agent are selected by the skilled artisan according to biochemical, biophysical, genetic, and physiologic considerations. Typical polynucleotide lengths are 16 to 105 nt.
- the protein component and polynucleotide component are generally incubated at about 10 to 120% polynucleotide to protein on a molar basis; e.g. at about 50%.
- the biologic agent is immediately added to the surfactant to create a reverse micelle.
- An aqueous solution of protein component—polynucleotide complex is encapsulated by dispersing the biologic agent into a biocompatible, water-miscible solvent using a biocompatible, water-insoluble surfactant system suitable for preparation of an inverted or reverse micelle.
- Suitable surfactant systems are well-known in the formulation arts as surface-active materials that are essentially hydrophobic and characterized by a hydrophile-lipophile balance (HLB) of less than about 6, a critical micelle concentration (CMC) of less than about 200 ⁇ M, or a critical packing diameter greater than 1.
- HLB hydrophile-lipophile balance
- CMC critical micelle concentration
- the HLB value is between about 3 and 8, between about 3 and 6, and between about 4 and 6.
- the hydrophobic is not biologically toxic as may be determined for example in cell culture testing.
- Suitable surface-active materials are non-ionic and thus not amphiphilic. In some embodiments, the HLB is less than about 5.
- Hydrophobic surfactants and hydrophobic, water-miscible solvents suitable for preparing reverse micelles are described in Pashley & Karaman (2004, In Applied Colloid and Surface Chemistry, John Wiley, pp. 60-85), Rosen (2004, in Surfactants and Interfacial Phenomena, John Wiley), The Handbook of Industrial Surfactants (1993, Ash, ed., Gower Pub), and Perry's Chemical Engineer's Handbook (1997, Perry & Green, 7th Ed., McGraw Hill Professional), incorporated herein by reference.
- the surfactant component may be 2,4,7,9-tetramethyl-5-decyn-4,7-diol(TM-diol), blends of 2,4,7,9-tetramethyl-5-decyn-4,7-diol(TM-diol), molecules having one or more acetylenic dial groups, cetyl alcohol, or any combination of any of these.
- water-miscible solvents comprising food or USP grade oils, such as DMSO, DMF, castor oil, or any combination thereof, may be used.
- a hydrophobic surfactant can be 2,4,7,9-tetramethyl-5-decyn-4,7-diol (TM-diol) or preparations thereof, such as Surfynol SE (Air Products), used in a concentration of up to about 15% by weight on protein, and a water-miscible solvent can be DMSO.
- concentration of surfactant selected should be sufficient to prepare an optically clear nanoemulsion, but not so much as to induce aggregation, since aggregation may lead to overly large nanoparticles.
- ligands can be mixed with nanoparticles in a ratio (by weight) of about 1:500 to about 1:0.1 of ligand to biologic agent, depending upon factors including the targeting moiety and the rate at which the nanoparticle is desired to dissolve or disassemble.
- the weight ratio is about 1:80 (that is, about 1/80th) of ligand to biologic agent.
- the weight ratio is about 1:40 of targeting moiety to biologic agent.
- ligand-coated nanoparticles are further stabilized.
- the aqueous suspension of nanoparticles coated with one or more ligands can be mixed into an aqueous solution of metal ions (i.e., a “stabilization solution or receiving bath”) capable of precipitating, crystallizing, or iontophoretic exchange with the coated nanoparticles.
- metal ions i.e., a “stabilization solution or receiving bath”
- solutes that can be used to form coated nanoparticles include ionic species derived from elements listed in the periodic table. Ions may be included in the aqueous stabilization composition in a range from about, for example, 0.1 part per trillion to about 1 M. An adequate amount of ion should be included, such that the coated nanoparticles are sufficiently contacted with ions, but not so much that aggregation occurs, which may lead to overly large nanoparticles.
- a stabilization (or crystallization or receiving) solution can comprise about 10 mM Ca 2+ and about 125 mM Li + . If ultrapure reagents are used in the stabilization solution, very small amounts (e.g., less than about 1 mM) of ions such as Ba, Fe, Mg, Sr, and Bi may be added to optimize stabilization of the coated nanoparticles. In one embodiment, when the nanoparticles are prepared with sterile water, 126 mM of Li + is pre-treated with 2.5 ppb of Cs + for increased stability.
- a stabilization solution includes 10.5 mM Ca 2+ , 125 mM Li + (pre-mixed with 2.5 ppb Cs + ), 0.042 mM Ba 2+ , 4 nM Bi 2+ with 7 nM Mg 2+ , 0.88 nM Sr 2+ , (all ultrapure, all prepared as stock solutions with sterile water, except Sr 2+ , and Mg 2+ which are prepared with laboratory grade water, all metals are used as chloride salts, total bath volume approximately 36 ml). Flexibility of the system is demonstrated by for example nanoparticles showing high levels of cellular uptake that have been synthesized at lithium levels about 10-fold lower than those described here (data not shown). The artisan will understand that a variety of counter-ions can be used with these metals in the stabilization solution, such as chloride, sulfate, and nitrate.
- the stabilization solution comprises lithium pretreated with Cesium (Cs).
- This stabilization is associated with changes in polymorphic form, as evidenced by substantive differences in melting point, thermal spectra and FTIR spectra.
- the ligand-coated nanoparticle may be used immediately or dried and reconstituted in the future.
- the instant nanoparticles have an average size of less than about 50 nm.
- the D 90 (that is, the minimum size which is greater than the diameter of 90% of the particles) is about 50 nm, or optionally about 45 nm, or optional about 40 nm, or optionally about 35 nm, or optionally about 30 nm.
- the instant nanoparticles are on average between about 2 and about 50 nanometers in diameter.
- Nanoparticles of the instant invention can optionally include a polymer shell comprising a ligand or targeting moiety for targeting the nanoparticles to a specific biological compartment, tissue, cell-type, or subcellular compartment.
- the instant nanoparticles provide a means for targeting the nanoparticles to a given tissue or cellular target, without the steps of chelating, conjugating, or covalently attaching the ligand or targeting moiety to the polymer coated nanoparticle or to the surfactant micelle.
- the instant nanoparticles comprise a hydrophobic surface for adsorbing ligands including hydrophilic ligands in a manner that does not require complex chemistry development and is not limited by the ligand-size constraints associated with for example nanoparticles comprising ligands conjugated to or within said nanoparticles. Accordingly, one having skill in the art will understand that, with judicious selection of a targeting moiety based upon the intended target and methods and compositions known in the art, the inventive nanoparticles are capable of delivering bioactive agents to predetermined target tissue and cells.
- Ligands can be natural or synthetic nucleic acids, proteins, peptides, small molecules, etc., such as asialoglycoprotein, insulin, low density lipoprotein, growth factors, galactose, lectin, folate, and monoclonal and polyclonal antibodies directed against cell surface molecules etc.
- tenfibgen can be a ligand of the instant invention and cause the nanoparticle to target tenascin receptors.
- ASOR asialoorosomucoid
- hyaluronan Other non-limiting examples include asialoorosomucoid (ASOR) and hyaluronan.
- the protein component is a Cas protein and the polynucleotide component is sgRNA.
- the instant invention it is only now possible to modulate gene expression through the CRISPR technology in a manner with one or more of greater precision, efficacy, higher therapeutic levels, cellular targeting, subcellular targeting, modular and versatile structure, and shelf stability.
- sgRNA-Casa nanoparticles can further comprise template DNA. It is clear, according to the examples contained herein and according to insight by the mind of the inventor, that the technology is operable over a wide range of Cas proteins (and Cas-like proteins) and over a wide range of guide nucleic acids.
- the protein component is any RISC protein such as an argonaute protein and the polynucleotide component is as guide RNA.
- RISC technology or RNAi technology
- the instant technology is useful when the protein component is any protein component involving endonuclease activity that interacts biologically and physically with a polynucleotide in a complex and where the interaction is part of a biologic unit or cellular machinery.
- the skilled artisan is now able to encapsulate for example proteins and polynucleotides with diverse physicochemical properties.
- the protein component is an enzymatically active protein and the polynucleotide component is a substrate for the enzymatically active protein component.
- the protein component is an enzymatically active protein and the polynucleotide component is a substrate for the enzymatically active protein component and the two components are complexed in the nanoparticle by an enzyme-substrate interaction.
- polynucleotide and protein components comprise PNA complexes and optionally further comprise donor DNA.
- the protein and polynucleotide components are not conjugated to each other.
- the instant nanoparticles comprise a surfactant wherein such surfactant is not amphiphilic.
- the instant nanoparticles do not require cholesterol for assembly; in other embodiments the instant nanoparticles do not contain cholesterol.
- the instant nanoparticles do not comprise polyethylene glycol (PEG) or derivatives thereof. In some embodiments, the instant nanoparticles do not comprise polyethylenimine (PEI) or derivatives thereof.
- PEG polyethylene glycol
- PEI polyethylenimine
- Nanoparticles of the present invention are useful for gene editing in vitro, ex vivo, and in vivo.
- Instant nanoparticles are useful for gene editing in subjects, e.g. any plant or animal recipient of the administered nanoparticles.
- Other non-limiting examples are mammals such as humans, non-human primates, vertebrate animals, rodents, and the like.
- Non-limiting examples of ex vivo systems useful in combination with instant nanoparticles are those where experimentation is done in or on tissue from an organism in an external environment.
- the instant nanoparticles are useful for providing therapies for diverse genetic diseases.
- Certain embodiments are useful for probing gene function in vivo (e.g. in animal models).
- Certain embodiments are useful for identifying molecular targets in animal models of disease.
- the skilled artisan will readily envision other utilities.
- Sg-Cas nanoparticles when further containing an appropriate donor template DNA, are useful for correcting such genetic defects.
- Sg-Cas nanoparticles or RISC nanoparticles are useful to induce gene silencing at the transcriptional level.
- Sg-Cas nanoparticles are useful to induce gene silencing at the translational level. Accordingly, such nanoparticles of the instant invention are useful for preventing synthesis of defective gene products; e.g. to treat autosomal dominant diseases.
- Sy-Cas nanoparticles according to the instant invention are useful to induce exon skipping to treat, for example, Duchene muscular dystrophy.
- instant nanoparticles may be topically administered to intact, unbroken skin.
- nanoparticles may be topically administered without the use of physical methods and/or external enzymatic penetration enhancers and/or external chemical penetration enhancers, thus potentially reducing or avoiding cell damage, treatment pain, and other adverse reactions at the site of treatment.
- the invention provides methods of treating a subject having a disease of the liver. Such methods generally include the steps of administering a composition of liver-specific nanoparticles to a subject having a disease of the liver. It is a feature of one embodiment of the invention that the instant nanoparticles comprising a ligand shell can be targeted to and bind to liver cells and the binding of the nanoparticles to the liver cells results in the delivery of the pharmaceutical agent to the liver cells.
- Representative diseases of the liver include, without limitation, alpha-1-antitrypsin deficiency, Wilson's disease, familial hypercholesterolemia, ornithine transcarbamylase deficiency, phenylketonuria, peroxisome diseases, and familial amyloidosis.
- the invention provides for methods of mediating site-directed repair of a genomic mutation in liver cells of a subject.
- compositions of the present invention may be administered by a number of routes, depending upon whether local or systemic treatment is desired and upon the area to be treated.
- administration may be topical (including ophthalmic, vaginal, rectal, intranasal, transdermal), oral or parenteral.
- topical treatment comprises treating a subject diagnosed with Pachyonychia Congenita disease.
- Parenteral administration includes intravenous administration, subcutaneous, intraperitoneal or intramuscular injection, intratumoral, or intrathecal or intraventricular administration.
- the flexibility of particle (composition) administration options is enabled, in part, by the small size and low surface charge of the inventive and highly stable nanoparticle, allowing the particle and its drug cargo to traverse biologic barriers and size-limited structures such as the bloodstream wall, lymphatic channels, and the skin to reach cellular and molecular targets.
- the target is an in vitro biological system such as in vitro tissues or cells.
- inventive non-ionic micelles and ligand-coated micelles are used for high-throughput testing of primary cells cultured 3-dimensionally.
- nanoparticles bearing protein combinations enable an ex vivo treatment of dendritic cells for subsequent readministration to a patient.
- nanoparticles bearing protein combinations enable an ex vivo treatment of dendritic cells for subsequent readministration to a patient for purposes of vaccination as part of a treatment protocol for solid and hemapoietic malignancies.
- instant nanoparticles are administered in to the airway epithelium.
- the nanoparticles carry a bioactive agent useful for treating any one of the following genetic disorders affecting the lungs: Acropectorovertebral dysplasia F form, Acute interstitial pneumonia, Allergic bronchopulmonary aspergillosis, Alpha-1 antitrypsin deficiency, Alveolar capillary dysplasia, Arterial tortuosity syndrome, Asbestosis, Autoimmune pulmonary alveolar proteinosis, Beryllium disease, Blau syndrome, Brain-lung-thyroid syndrome, Bronchiolitis obliterans, Bronchiolitis obliterans organizing pneumonia, Bronchogenic cyst, Bronchopulmonary dysplasia, Cantu syndrome, Catamenial pneumothorax, Children's interstitial lung disease, Chronic granulomatous disease, Chronic thromboembolic pulmonary hypertension, Classical-like Ehlers-Danlos syndrome, Co
- the instant nanoparticles have one or more of the following surprising superior results:
- Nanoparticles are generated as follows. These examples describe how some colloidal formulations of diverse cargos and biocompatible polymers may be generated, for subsequent in vivo and in vitro administration, Nanoparticles are prepared by the “dispersion atomization” method described in U.S. Pat. No. 6,632,671, which is incorporated herein by reference in its entirety, using modifications as described herein.
- the instant protein components are recombinantly prepared at PNA Bio (dCas9-NLS), Novaprotein (Cas9; E67) and Active Motif (Flag-Argonaute 2, 31886). Polynucleotide preparations are synthesized as described in Table 1.
- Nanoparticles were made and designated as set forth in Table 2
- Formula A (ASOR rAgo2, MW 106 kDa). About 31.25 ⁇ g of Flag-Ago2 (from insect cells) is resuspended into about 100 ⁇ l of reaction buffer (prepared using sterile water as about 20 mM Hepes, about ph 7.4, about 5% ethylene glycol, about 1 mM DTT) following washing with reaction buffer through about a 30 kDa MWCO filter (Vivaspin 6, Sartorius). This protein component is then dispersed using a water-insoluble surfactant system (2,4,7,9-tetramethyl-5-decyn-4,7-diol (TM-diol; SE-30 (Air Products), about 1 ⁇ g in about 50% DMSO.
- TM-diol water-insoluble surfactant system
- DMSO water-miscible solvent
- the resultant hydrophobic micelles are coated (non-covalently) by the addition of about 0.4 ⁇ g of Asialoorosomucoid (Athens Research), placed in a bath sonicator for about 30 minutes, is transferred to a 5 ml polypropylene tube, and is diluted up to about 3 ml with PBS, prepared with sterile water, then is atomized with a manual actuator using an approximately 250 ⁇ m diameter orifice with feed pressure of less than about 10 psi into a salt receiving solution of sterile water containing primarily Li + (about 31.4 mg Li + (premixed with about 2.5 ppb Cs + on Li + ), about 15.0 mg Ca 2+ , about 210 ⁇ g Ba 2+ , about 29 ⁇ g Bi 2+ with about 6.12 ng Mg 2+ , about 2.76 ng Sr 2+ , (all ultrapure, all are prepared as stock solutions with sterile water except Sr 2+ and Mg 2+ are prepared with
- the total reaction volume is approximately 36 ml.
- the level of the following metals tested for in the sterile water used to prepare the stabilization solution is determined to be less than about 0.2 parts per million in sum total: aluminum, arsenic, barium, cadmium, chromium, copper, iron, lead, manganese, nickel, rubidium, sulfur, vanadium, and zinc.
- the premixing step comprises adding Cs + at about 0.1 ⁇ g/1 ml to about 4M Li + , at about 2.5 ppm Cs + to Li + by weight, in sterile water in a 50 ml tube, and rotating for about 2 minutes. Following cold-room incubation (at about 4° C.) on a roller mill at about 0.5 rpm in 40 ml round-bottomed tubes for about 4 hours, which further stabilizes the coated micelles in the salt solution, the sub-50 nm nanoparticles are recovered by centrifugation at about 20,000 ⁇ g at about 4° C.
- a small amount (about 1% of coating weight) of Syrian Hamster IgG is added in tracer amounts into the ligand coat to enable immunodetection of nanoparticle uptake by anti-Syrian Hamster antibodies.
- Average particle size is less than about 50 nm, as measured Dynamic Light Scattering (DLS) on a Nicomp ZLS 380 instrument. Particle size is measured as about 2 ⁇ 0.4 nm, a count rate of about 84 KHz with population volume of about 99.8% along with a surface charge of about 5.6+/ ⁇ 0.5 mV per manufacturer's instruction.
- DLS Dynamic Light Scattering
- Formula B (ASOR rAgo2 RNAiF7-50), Approximately 50% of the Ago2 is co-encapsulated with the polynucleotide component as in Formula A and as follows. About 31.25 ⁇ g of Flag-Ago2 (from insect cells) is resuspended into about 100 ⁇ l of reaction buffer (prepared using sterile water as about 20 mM Hepes, at about ph 7.4, about 5% ethylene glycol, about 1 mM DTT) following washing with reaction buffer through an about 30 kD MWCOa filter (Vivaspin 6, Sartorius).
- reaction buffer prepared using sterile water as about 20 mM Hepes, at about ph 7.4, about 5% ethylene glycol, about 1 mM DTT
- RNAi F7 polynucleotide
- siFVII siFVII
- Polynucleotide-protein complex is then dispersed using a water-insoluble surfactant system (2,4,7,9-tetramethyl-5-decyn-4,7-diol (TM-diol; Surfynol SE (Air Products), about 1 ⁇ g in about 50% DMSO.
- TM-diol 2,4,7,9-tetramethyl-5-decyn-4,7-diol
- Surfynol SE Air Products
- the resultant hydrophobic micelles are coated (non-covalently) by the addition of about 0.4 ⁇ g of Asialoorosomucoid (Athens Research), are placed in a bath sonicator for about 30 minutes, are transferred to a 5 ml polypropylene tube, and are diluted up to about 3 ml with PBS, then they are atomized with a manual actuator using an approximately 250 ⁇ m diameter orifice with feed pressure of less than about 10 psi into a salt receiving solution of sterile water containing primarily Li + (about 31.4 mg Li + (premixed with about 2.5 ppb Cs + on Li + ), about 15.0 mg Ca 2+ , about 210 ⁇ g Ba 2+ , about 29 ⁇ g Bi 2+ with about 6.12 ng Mg 2+ , about 2.76 ng Sr 2+ , (all ultrapure, all are prepared as stock solutions with sterile water except Sr 2+ and Mg 2+ prepared with laboratory grade water, all metal
- the approximately sub-50 nm nanoparticles are recovered by centrifugation at about 20,000 ⁇ g at 4° C.
- Average particle size for Formula B is less than about 50 nm as measured by DLS. Particle size is measured as about 11 ⁇ 2 nm, a count rate of about 24 KHz with population volume of about 99.6% along with a surface charge of about 3 ⁇ 0.6 meV per manufacturer's instruction.
- Formula C (ASOR rAgo2 RNAiF7-100) is formulated similarly to Formula B except that the Ago 2 protein is reacted with the polynucleotide comprising chimeric single-stranded poly RNAi F7 in an amount calculated to achieve about 110% of completion of the reaction in that about 325 pmol of the polynucleotide was reacted with about 295 pmol of Ago2 to initiate a core to support formation of a micelle.
- average particle size for Formula C is less than about 50 nm, as measured by DLS. Particle size is measured as about 19 ⁇ 2 nm, a count rate of about 26 kHz with population volume of about 98.6% along with a surface charge of about 2.9+/ ⁇ 0.1 mV per manufacturer's instruction.
- Formula D (ASOR rAgo2 2RF7) is formulated similarly to Formula C with the change that the polynucleotide (guide strand) has a different backbone chemistry (2RF7, Sequence 1). 2RF7 is distinguished from RNAi F7 by modifying the typical nucleotide in position 2 from the 5′ end to a 2′-O-Methyl Ribonucleotide.
- average particle size for Formula C is less than about 50 nm, as measured by DLS. Particle size is measured as about 14 ⁇ 2 with population volume of about 99.5% along with a surface charge of about 0.3+/ ⁇ 1 mV per manufacturer's instruction.
- Formula E (ASOR RNAiF7 6115 Da MW). About 250 ⁇ g of about 20 mer, chimeric, single-stranded guide strand RNAiF7 (Table 1) is formulated generally as in Formula A, by first complexing the polynucleotide component with about 62.5 ⁇ g of about 11,800 Da MW polyornithine (Sigma), then dispersing using a water-insoluble surfactant system (2,4,7,9-tetramethyl-5-decyn-4,7-diol (TM-diol; SE-30 (Air Products), at about 7.5 ⁇ g in about 50% DMSO.
- TM-diol 2,4,7,9-tetramethyl-5-decyn-4,7-diol
- SE-30 Air Products
- the resultant micelles are then inverted and diluted by adding about 700 ⁇ l of PBS, also prepared in sterile water.
- the resultant hydrophobic micelles are then processed as generally described in Formula A with the following changes in receiving bath component weights: about 2.42 ng Mg 2+ , about 10.92 ng Sr 2+ .
- average particle size for Formula E is less than about 50 nm, as measured by DLS. Particle size is measured per manufacturer's instruction at about 10 ⁇ 1 nm with population volume of about 99.2% along with a surface charge of about 0.2+/ ⁇ 0.4 mV.
- Formula F (ASOR siF7, 13,800 Da MW nominal) about 250 ⁇ g of about 21 mer, unmodified, double-stranded RNA polynucleotide (siFVII, Akinc, et. al, 2009 Mol Ther 17(5)872-879), is first complexed with about 54 ⁇ g Beta-cyclodextrin (Sigma), then is dispersed into about 100 ⁇ l of sterile water using a water-insoluble surfactant system (2,4,7,9-tetramethyl-5-decyn-4,7-diol (TM-diol; SE-30 (Air Products)), about 7.5 ⁇ g in about 50% DMSO.
- TM-diol water-insoluble surfactant system
- the resultant hydrophobic micelles are then processed as generally described in Formula A with the following changes in receiving bath component weights: about 10.72 ng Mg 2+ , about 212.5 ng Sr 2+ .
- average particle size for Formula E is less than about 50 nm, as measured by DLS. Particle size is measured per manufacturer's instruction at about 11 ⁇ 2 nm with population volume of about 99.4% along with a surface charge of about 0.2 ⁇ 0.7 meV.
- Formula G (ASOR sugar), about 500 ⁇ g of erythritol (MW 122.12) is dispersed into about 100 ⁇ l of sterile water using a water-insoluble surfactant system (2,4,7,9-tetramethyl-5-decyn-4,7-diol (TM-diol; SE (Air Products)), about 8.75 ⁇ g in about 50% DMSO.
- TM-diol 2,4,7,9-tetramethyl-5-decyn-4,7-diol
- SE Air Products
- the resultant hydrophobic micelles are then processed as generally described in Formula A with the following changes in receiving bath component weights: about 5.75 ng Mg 2+ , about 10.36 ng Sr 2+ ,
- average particle size for Formula E is less than about 50 nm, as measured by DLS. Particle size is measured per manufacturer's instruction at about 13.3 ⁇ 1.9 nm with population volume of about 99% along with a surface charge of about 0.04 ⁇ 0.75 meV.
- the polynucleotide component used here is the recombinant Cas9 endonuclease (Novoprotein E365, pl 9.1, 163 kDa MW) and is reacted with, as the polynucleotide, guide RNA (F7-short). This creates a species with an overall negative charge.
- the equimolar amount of the about 105 nt guide RNA carries approximately 3.25 nmol ( ⁇ ) charge per ⁇ g from phosphate groups, while the protein component carries about a +22 charge per molecule as reported from sequence and supported by it high isoelectric point.
- an imbalance of negative charge is operable following protein-substrate binding, e.g. about 4290 pmol of (+) charge from about 195 pmol of Cas9 is not balanced by ⁇ 22680 of phosphate charge from about 216 pmol of sgRNA.
- recombinant Cas9 is coencapsulated with the polynucleotide component at about 110% molar completion of the reaction in a sequence similar to Formula A as follows.
- About 31.25 ⁇ g of recombinant Cas9 (from E. Coli ) is resuspended into about 100 ⁇ l of reaction buffer (prepared using sterile water as about 20 mM Hepes, at about ph 7.4, about 5% ethylene glycol, about 1 mM DTT).
- the protein component Cas9 ( ⁇ 195 pmol) is then reacted with an amount of guide RNA (crF7, Table 1) sufficient to drive about 110% completion ( ⁇ 216 pmol) of the reaction by slow trituration every two minutes over a six minute period.
- the polynucleotide component is crF7 guide RNA (single-stranded, about MW 33,528) listed as Sequence 3 in Table 1.
- the protein-polynucleotide complex is then dispersed using a water-insoluble surfactant system (2,4,7,9-tetramethyl-5-decyn-4,7-diol (TM-diol; SE (Air Products), about 1 ⁇ g in about 50% DMSO.
- TM-diol water-insoluble surfactant system
- SE Air Products
- DMSO water-miscible solvent
- the micelles are then inverted and diluted by the addition of about 700 ⁇ l of PBS.
- the resultant hydrophobic micelles are then processed as generally described in Formula A except that the receiving bath component weights are about 5.75 ng Mg 2+ and about 2.6 ng Sr 2+ .
- average particle size for Formula E is less than about 50 nm, as measured by DLS. Particle size is measured per manufacturer's instruction at about 23.4 ⁇ 4.3 nm with population volume of about 91.2% along with a surface charge of about 0.03 ⁇ 0.78 mV.
- TEM for Formula Ha is illustrated in FIG. 1 and shows a fractal crystalline morphology with a visible protein ligand corona.
- Formula Hb A more stable crystalline variant of Formula Ha is synthesized by incubating ASOR ligand-coated micelles in the receiving bath for about 36 hours rather than about 4 hours.
- the receiving bath component weights are about 5.23 ng Mg 2+ , about 2.36 ng Sr 2+ and without bismuth.
- the receiving bath volume is about 40.5 and the total reaction volume is about 44.4 ml.
- average particle size for Formula E is less than about 50 nm, as measured DLS. Particle size is measured per manufacturer's instruction at about 19 ⁇ 3.2 nm with population volume of about 97.1% along with a surface charge of about 0.07 ⁇ 0.73 meV.
- Formula Hc is formulated similarly to Formula Ha with the change that about 31.25 ug of a non-canonical TypeII-B Cas9, without a bi-lobe nuclease structure, e.g., from F. Novicida is substituted in as the enzymatic protein pre-reacted with it RNA binding partners.
- Average particle size for Formula Hc is less than about 50 nm, as measured Dynamic Light Scattering (DLS) on a Nicomp ZLS 380 instrument. Zeta potential is measured, based on manufacturer's instructions, and determined to approximately neutral.
- DLS Dynamic Light Scattering
- Formula Hd is formulated similarly to Formula Hc with the change that non-canonical Type V Cpf1 is substituted for non-canonical Type II-B Cas9.
- Formula I (ASOR dCas9 F7), Formula I is formulated similarly to Formula Ha with the change that the protein component is double mutant recombinant spCas9 with about 6 ⁇ his tag and NLS from SV40 N-terminus ((D10A/H840A, PNA Bio #CD03) at about 31. about 25 ⁇ g.
- Average particle size for Formula I is less than V50 nm, as measured by DLS. Particle size is measured as about 2K 14+/ ⁇ 2 nm with population volume of about 98.9% along with a surface charge of about 0.6+/ ⁇ 0.8 mV per manufacturer's instruction.
- Formula J (Tenfibgen Chymotrypsin-Trypsin).
- Formula J is formulated similarly to Formula A with the change that about 31.25 ⁇ g of trypsin-chymotrypsin mixture (in the activity ratio 6:1) having enzymatic activity of about 2000 AU/mg was substituted for the enzyme-substrate combination and tenfibgen (MW 26,500 Da, the fibrinogen fragment of Tenascin-C, fully incorporated from U.S. Ser. No. 14/844,828) is substituted for ASOR.
- the resultant hydrophobic micelles are then processed as generally described in Formula A with the following changes in receiving bath concentrations: about 6.38 ng Mg 2+ , about 28.75 ng Sr 2+ .
- Particles are incubated with rolling as described in Formula A with the change of about 48 hours of incubation time before centrifugation and purification.
- non-ionic micelles without ligand coating and ligand-coated micelles without crystallization are also produced.
- Average particle size for Formula J is less than about 50 nm, as measured Dynamic Light Scattering (DLS) on a Nicomp ZLS 380 instrument. Zeta potential is measured as approximately neutral per manufacturer's instruction.
- DLS Dynamic Light Scattering
- Formula K (Tenfibgen Erythritol), about 500 ⁇ g of erythritol (MW 122.12) is dispersed into about 100 ⁇ l of sterile water using a water-insoluble surfactant system (2,4,7,9-tetramethyl-5-decyn-4,7-diol (TM-diol; SE (Air Products), about 8.75 ⁇ g in about 50% DMSO.
- TM-diol water-insoluble surfactant system
- SE Air Products
- Particles are incubated with rolling as described in Formula A with the change of about 48 hours of incubation time before centrifugation and purification.
- average particle size for Formula E is less than about 50 nm, as measured Dynamic Light Scattering (DLS) on a Nicomp ZLS 380 instrument.
- compositions and methods for formulation of nanoparticles to deliver protein-polynucleotide complexes where the nanoparticles may be nonionic, ligand-coated or crystalline ligand-coated.
- the species demonstrate similar desirable properties across a range of diverse cargos and chemistries.
- nucleoprotein complexes as the biologic agents taught here as pre-formed entities have not been successful until the development of the instant invention.
- the protein components was Ago2
- a 104 kDa endonuclease was coupled with the polynucleotide component of a short, approximately 22 mer, RNA “guide strand” (in this example, a chimeric guide strand) against murine Coagulation Factor VII to provide specificity for specific cleavage of the target mRNA, to inhibit production of the target Factor VII.
- RNA “guide strand” in this example, a chimeric guide strand
- Encapsulation of the Ago2—guide strand complex is compared with 1) protein component alone (Formula A), 2) anti-Factor VII guide strand—Ago complex with about 50% molar complexation (Formula B), 3) anti-Factor VII guide strand with Ago2 complex with about 110% molar complexation (Formula C) and 4) anti-Factor VII guide strand—Ago2 complex with about 110% molar complexation using an alternate backbone chemistry for the polynucleotide chimeric guide strand.
- nanoparticles are characterized by DLS and zeta potential.
- Supernatants from the lithium crystallization solution (mother liquor) were buffer-exchanged using an about 5 kDa MWCO ultrafilter (Vivaspin 20, Sartorius).
- Equal volumes are normalized to the control (Ago2 and excipients without crystallization but filtered) from each of the approximately 100 ⁇ l retentates are electrophoresed on an about 4-12% gradient bis-tris gel (Invitrogen) using a Tris-glycine buffer and detected for protein by silver staining (Pierce).
- Ago2 standard on gel is about 0.6 ⁇ g
- Supernatant concentrates represented approximately 25% of the total reaction supernatant.
- Densitometry is performed in NIH Image J using mean values of equivalent areas subtracted from nearby background.
- 3D hepatocyte cell cultures are prepared by plating about 25,000 murine FL83B murine hepatocyte cells on to ECM-coated spun polymer scaffolds (Corning, UltraMax) in chamber slides.
- Formula B and Formula E nanoparticles are added at various concentrations to the cultures and harvested for microscopy after about 3 days.
- Dose response for Factor VII protein inhibition are assayed by confocal fluorescence microscopy for Factor VII immunosignal (GeneTex) and qPCR.
- Formula B administration demonstrates full inhibition of Factor VII protein at about 1 pmol (about 4 nM) continuing through about 2.0 nM with recovery beginning around about 0.32 nM demonstrating about a 3 log response range.
- Formula E bearing the guide strand only shows full inhibition by microscopy at about 5 nmol (about 20 ⁇ M) recovering by about 1.25 nmol (about 5 ⁇ M) for about a 0.4 log response range and approximate increase in activity of about 3.5 logs (about 2 nM vs. about 12.5 ⁇ M) for encapsulated RISC complex vs encapsulated guide RNA alone. Results are illustrated in FIG. 3 .
- RISC nanoparticles about 10e13 particles are approximately equal to about 250 pmol or about 1.36 mg/kg of protein complex while this particle dose is approximately equal to about 1 nmol or about 0.75 mg/kg of polynucleotide component. Particle numbers are estimated assuming closest theoretical packing into final particle size measured by DLS.
- citrated plasma is collected for Factor VII ELISA by terminal cardiac puncture.
- blood from RISC nanoparticle-treated animals is bright red and of very low viscosity, while blood from control animals is dark with a purple hue and of much higher viscosity in the collection syringe.
- Blood from animals treated with nanoparticles made to contain F7 RNA or siRNA without Ago2 appear to be of an intermediate nature.
- a Factor VII ELISA of citrated plasma samples shows that only nanoencapsulated RISC has a significant (about 83%) reduction in Factor VII plasma protein at Day3.
- Lower doses of nanoencapsulated RISC or oligo or siRNA show no change or in some cases elevations suggesting that biological modulation is occurring.
- RISC nanoparticle demonstrates superior effective systemic delivery and efficacy and retention of enzymatic activity.
- Supramolecular crystalline RISC shows significant improvement in inhibition of phenotypic activity and transcript levels confirming in vitro results observed in 3D cell culture.
- Three dosing levels are examined with a two dose regimen; 1) about 3e12 particles at about 1.6 mg/kg; 2) about 3e11 particles at about 160 ⁇ g/kg q3D; and 3) about 3e10 particles at about 16 ⁇ g/kg q3D of RISC nanoparticles.
- Particle numbers are estimated assuming closest theoretical packing into final particle size measured by DLS.
- a fractional factorial design is used with groups of three assigned to each dissolution profile design, and mice are sacrificed to collect livers for microscopy, western blotting, qPCR and mutational analysis at about 7 days post initiation of treatment.
- Cas9 immunosignal shows a punctate cytoskeletal pattern at mg/kg dose levels (highest dose, about 3e12 particles) in individual hepatocytes that decreases with dose level to not detectable at about 16 ⁇ g/kg (lowest dose level, 3e10 particles).
- amplicon sequencing using an Illumina Miseq approach detects no double strand breaks as having occurred at the target site indicating no cutting activity of the Cas9 enzyme.
- qPCR executed using Exon 1 primer indicates no change in Factor VII transcript had occurred while qPCR executed using the downstream Exon 4 primer indicates an approximately 39% decrease in transcript measured as ( ⁇ cycle time,(2 ⁇ circumflex over ( ) ⁇ ( ⁇ Ct)), for treated vs. control, about 0.62 ⁇ 0.16 vs.
- Three dosing levels are examined with a two dose regimen; 1) about 10e14 particles at about 1.6 mg/kg; 2) about 10e13 particles at about 160 ⁇ g/kg q3D; and 3) about 10e12 particles at about 16 ⁇ g/kg q3D of RISC nanoparticles.
- Particle numbers are estimated assuming closest theoretical packing into final particle size measured by DLS.
- a fractional factorial design is used with groups of three assigned to each dissolution profile design, and mice are sacrificed to collect livers for microscopy, western blotting, qPCR and mutational analysis at 7 days post initiation of treatment.
- Cas9 immunosignal shows a punctate cytoskeletal pattern at mg/kg dose levels (highest dose, about 10e14 particles) in individual hepatocytes that decreased with dose level to not detectable at about 16 ⁇ g/kg (lowest dose level, about 10e12 particles).
- amplicon sequencing using an Illumina Miseq approach detects no double strand breaks as having occurred at the target site which indicates no cutting activity of the Cas9 enzyme.
- qPCR executed using Exon 1 primer indicates no change in Factor VII transcript had occurred while qPCR executed using the downstream Exon 4 primer indicated an approximately 30% decrease in transcript measured as ( ⁇ cycle time,(2 ⁇ circumflex over ( ) ⁇ ( ⁇ Ct)), for treated vs. control, about 0.07 ⁇ 0.09 vs.
- mice Lethal inflammatory responses have been a problematic sequelae of conventional non-viral strategies for systemic delivery of bacterially-derived NPs.
- a panel of inflammatory cytodines including GM-CSF, IFNa, IFNg, IL-1b, IL-6, MCP-1, Rantes and TNFa in the highest dose level group (2 ⁇ 1.6 mg/kg, 3e12 particles) for both nanoparticle designs (Formulas Ha, Hb) vs. control.
- this top dose level was also found to be non-optimal coincident with dysregulation in intracellular trafficking.
- dCas9 is mutated (H840A, D10A) in the HNH and RUVEC cleavage domains respectively but does not lose substrate recognition for the guide RNA and joint substrate recognition for the target chromosome site.
- dCas9 enzyme binds its sgRNA substrate, it physically reconfigures and transforms into a specific chromosomal binding protein to block mRNA transcription by the RNA polymerase.
- mice Lethal inflammatory responses have been a problematic sequelae of conventional non-viral strategies for systemic delivery of bacterially-derived NPs.
- all mice survive and are assayed for a panel of inflammatory cytodines, including GM-CSF, IFNa, IFNg, IL-1b, IL-6, MCP-1, Rantes and TNFa in the highest dose level group (about 2 ⁇ 1.6 mg/kg, about 3e12 particles) for both nanoparticle designs (Formulas Ha, Hb) vs. control.
- this top dose level is also found to be non-optimal coincident with dysregulation in intracellular trafficking.
- dCas9 is mutated (H840A, D10A) in the HNH and RUVEC cleavage domains respectively but does not lose substrate recognition for the guide RNA and joint substrate recognition for the target chromosome site.
- dCas9 enzyme binds its sgRNA substrate, it physically reconfigures and transforms into a specific chromosomal binding protein to block mRNA transcription by the RNA polymerase.
- mice Lethal inflammatory responses have been a problematic sequelae of conventional non-viral strategies for systemic delivery of bacterially-derived NPs.
- all mice survive and are assayed for a panel of inflammatory cytodines, including GM-CSF, IFNa, IFNg, IL-1b, IL-6, MCP-1, Rantes and TNFa in the highest dose level group (about 2 ⁇ 1.6 mg/kg, about 10e14 particles) for both nanoparticle designs (Formulas Ha, Hb) vs. control.
- this top dose level is also found to be non-optimal coincident with dysregulation in intracellular trafficking.
- dCas9 is mutated (H840A, D10A) in the HNH and RUVEC cleavage domains respectively but does not lose substrate recognition for the guide RNA and joint substrate recognition for the target chromosome site.
- dCas9 enzyme binds its sgRNA substrate, it physically reconfigures and transforms into a specific chromosomal binding protein to block mRNA transcription by the RNA polymerase.
- 3D hepatocyte cell cultures are prepared by plating about 25,000 murine FL3B murine hepatocyte cells on to ECM-coated spun polymer scaffolds (Corning, UltraMax) in chamber slides. It is worth noting that cells completely reorganize their internal geometry in 3D systems, supporting the use of 3D cultures in CRISPR and intracellular trafficking studies.
- Neither formulation shows significant mutation activity while plasmid Cas9 and sgRNA delivered from separate ASOR nanoencapsulates do show mutational activity by amplicon deep sequencing.
- protein co-encapsulation with a polynucleotide substrate is effective for enhancing incorporation into crystalline supramolecular complexes for retention of enzyme bioactivity in non-inflammatory systemic delivery of bacterial dCas9 protein.
- Example 11 Provides Cells with Active RISC for Enhanced Target Gene Modulation
- 3D hepatocyte cell cultures are prepared by plating about 25,000 murine FL83B murine hepatocyte cells on to ECM-coated spun polymer scaffolds (Corning, UltraMax) in chamber slides.
- Formula B and Formula E nanoparticles are added at various concentrations to the cultures and harvested for microscopy after about 3 days.
- Dose response for Factor VII protein inhibition is assayed by confocal fluorescence microscopy for Factor VII immunosignal (GeneTex).
- Formula B administration demonstrates full inhibition of Factor VII protein at about 1 pmol (about 4 nM) continuing through about 2.0 nM with recovery beginning around about 0.32 nM demonstrating about a 3 log response range.
- Formula E bearing the guide strand only shows full inhibition by microscopy at about 5 nmol (about 20 ⁇ M) recovering by about 1.25 nmol (about 5 ⁇ M) for about a 0.4 log response range and approximate increase in activity of about about 3.5 logs (about 2 nM vs. 12.5 ⁇ M) for encapsulated RISC complex vs encapsulated guide RNA alone. Results are illustrated in FIG. 3 .
- 3D hepatocyte cell cultures are prepared by plating about 25,000 murine FL3B murine hepatocyte cells on to ECM-coated spun polymer scaffolds (Corning, UltraMax) in chamber slides. It is worth noting that cells completely reorganize their internal geometry in 3D systems, supporting the use of 3D cultures in CRISPR and intracellular trafficking studies.
- Formula Ha (ASOR Cas9 crF7) and Formula I (ASOR dCas9 crF7) are analyzed for functional activity by treating 3D mouse hepatocyte cultures at two dose levels (about 2 nM and 0.4-0.6 nM) and then are assayed for Factor VII protein levels after about 3 days by confocal immunofluorescence microscopy.
- Neither formulation shows significant mutation activity while plasmid Cas9 and sgRNA deliver from separate ASOR nanoencapsulates show mutational activity by amplicon deep sequencing.
- protein co-encapsulation with a polynucleotide substrate is effective for enhancing incorporation into crystalline supramolecular complexes for retention of enzyme bioactivity in non-inflammatory systemic delivery of bacterial dCas9 protein.
- 3D hepatocyte cell cultures are prepared by plating about 25,000 murine FL3B murine hepatocyte cells on to ECM-coated spun polymer scaffolds (Corning, UltraMax) in chamber slides. It is worth noting that cells completely reorganize their internal geometry in 3D systems, supporting the use of 3D cultures in CRISPR and intracellular trafficking studies.
- Results for Formulas Ha and I are illustrated in FIG. 4 .
- Neither formulation shows significant mutation activity while plasmid Cas9 and plasmid sgRNA delivered from separate ASOR nanoencapsulates show mutational activity by amplicon deep sequencing.
- Formula He and Formula Hd in contrast to Formula Ha, induce mutation of the F7 sequence at the level of the chromosome along with inhibition of F7 protein expression.
- Neither formulation shows significant mutation activity while plasmid Cas9 and sgRNA delivered from separate ASOR nanoencapsulates show mutational activity by amplicon deep sequencing.
- protein co-encapsulation with a polynucleotide substrate is effective for enhancing incorporation into crystalline supramolecular complexes for retention of enzyme bioactivity in non-inflammatory systemic delivery of bacterial dCas9 protein.
- thermograms generated by differential scanning calorimetry (DSC) on a STA 449 F3-Jupiter thermal analyzer Suspensions are dried to produce powder for analysis, and about 1-2 mg were scanned at about 20° C./min from room temperature to about 400° C. in uncrimped aluminum pans.
- Abbreviations used here are: gt, glass transition; et, endotherm; vs. very small.
- Ligand-coated micelles are micelles formulated according to respective formulation but do not undergo incubation in salt receiving solution.
- the FTIR spectra are recorded from about 400 to 4000 cm ⁇ 1 using an Agilent Cary 670 spectrophotometer, equipped with a Pile MIRacle ATR accessory a mid-infrared source as the excitation source. Liquid samples are placed directly on the crystal, and the high pressure clamp is used for solid samples. Prior to analysis, the entire instrument is purged with dry, CO 2 -free air for at least 30 minutes and until background scans indicated no or negligible change in atmospheric moisture or CO 2 levels. The ATR crystal and the high pressure clamp are both cleaned with mQ water (18 ⁇ ) between measurements and dried with a cotton cloth until the processed spectrum indicated that no residual sample remained on the crystal. The spectra were acquired in about 32 scans at a resolution of about 1 cm ⁇ 1 at ambient conditions. Abbreviations, v, very; s, small; md, moderate; str, strong; brd, broad.
- DSC shows only endotherms in final lithium-treated particles supporting crystallinity for ASOR Cs-modified lithium polymorphs.
- FTIR of hydrated nanoparticle powders identify a peak attributable to the ASOR ligand at about 1035 (about 1010-1050) cm ⁇ 1 .
- a peak attributable to the Cs-modified lithium is readily apparent at about 620-650 cm 1 while at the same time the ASOR ligand peak was greatly diminished.
- This broad doublet at about 655, 620 cm ⁇ 1 is not visible in powders from paired ligand-coated intermediates before lithium exposure.
- the spectral pattern of ASOR-liganded crystalline capsules is similar despite diverse cargos.
- spectra from ASOR ligand-coated intermediates does show differences between diverse cargos that are not apparent in spectra from final product.
- Formula B (ASOR RISC RNAiF7) and Formula E (ASOR RNAi F7), are prepared as ASOR-coated micelles and ligand-coated micelles, terminating synthesis just before addition to the lithium receiving bath for crystallization and hardening (referred to herein as “non-crystallized nanoparticles”).
- 3D cultures of FL83B are treated at six dose levels of about 1 pmol, about 0.5 pmol, about 0.1 pmol, about 0.05 pmol and about 0.01 pmol for Formula B and about 5 nmol, about 2.5, about 1.25, about 0.75, about 0.5 and about 0.1 nmol for Formula E to show increased activity at lower doses than observed with fully crystallized particles.
- This example shows as one embodiment the instant non-crystallized nanoparticles are useful to deliver protein-substrate combinations in applications where a drug is desirably released faster than it is with a crystallized particle.
- the applications for the instant non-crystallized nanoparticles are used over the short time course of a cell culture experiment.
- Formula J (Tenfibgen Chymotrypsin-trypsin) is prepared as ASOR-coated micelles and ligand-coated micelles, terminating synthesis just before addition to the lithium receiving bath for crystallization and hardening.
- Formula K is prepared as a suspension of Tenfibgen crystalline nanoparticles containing erythritol for a comparator nanoparticle.
- Organ cultures of dermal explants representing normal and wound-activated conditions, eg. post-radiation, are treated at about 3 dose levels of Chymotrpsin-Trypsin; eg.
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Abstract
Description
- i) the protein component and the polynucleotide component function as a complex in concert as a biologic agent;
- ii) the protein component and the polynucleotide component form a complex;
- iii) the complex and the surfactant form a surfactant micelle core;
- iv) the optional hydrophilic polymer forms a shell around the micelle core;
- v) the nanoparticles have an average diameter of less than about 50 nanometers; and
- vi) the biologic agent is optionally a therapeutic agent.
-
- a Cas9 protein and a sgRNA;
- a Cas9 protein, an sgRNA, and a donor template DNA;
- a dCas9 protein and an sgRNA;
- a Cpf1 protein and a sgRNA;
- a PNA; and/or
- FEN-1 and a guide nucleic acid.
- a. When administered to a subject in need, they demonstrate superior efficacy when compared to nanoparticles lacking the protein component;
- b. Demonstrate reduce immunogenicity;
- c. Result in delivery to relevant subcellular locations;
- d. Provide a means to supply functional machinery components to cell types that otherwise are deficient in them;
- e. Provide higher therapeutic levels at the target tissues; and/or
- f. Show increased stability in vivo and upon storage
TABLE 1 |
Polynucleotide component preparations |
Seq | Sequence | Manufac- | ||
No. | Name | Description | (5′-3′) | turer |
1 | RNAi | Single- |
5′-gta aga ctt | Trilink |
F7 | chimeric | gag a 2o′ME | ||
[UGAUCC]- | ||||
(propyl)-3′ | ||||
1 | 2RF7 | Modified single- | 5′-g2o′ME[U]a | Trilink |
strand chimeric | aga ctt gag a | |||
2o′ME[UGAUCC]- | ||||
(propyl)-3′ | ||||
2 | siF7 | Double-stranded | 5′□GGAUCAUC | Dharmacon |
siRNA | UCAAGUCUUAC | |||
TT-3′(p) | ||||
3 | crF7 | Single guide | AAGCACAUGGUGU | Trilink |
(sg) RNA | CCUACACGUUUUA | Biotech- | ||
equaling 19 | GAGCUAGAAAUAG | nologies | ||
nt targeting | CAAGUUAAAAUAA | |||
sequenc (BOLD) + | GGCUAGUCCGUUA | |||
tracer RNA scaf- | UCAACUUGAAAAA | |||
folding sequence | GTGGCACCGAGU | |||
modified by the | CGGUGCUUUU | |||
MS method of | ||||
Porteus | ||||
(2015 NBT). | ||||
*p denotes passenger strand, sense strand or mRNA target region. | ||||
Lower case denotes phosphodiester DNA, upper case RNA. |
TABLE 2 |
Nanoparticle Designations |
Protein | Polynucleotide | ||||
ligand | compnent | component | other | ||
Formual A | ASOR | rAgo2 | ||
Formulas B | ASOR | rAgo2 | RNAiF7-50 | |
Formula C | ASOR | rAgo2 | RNAiF7-100 | |
Formula Da | ASOR | rAgo2 | 2RF7 - | |
Formula E | ASOR | RNAiF7 | ||
Formula F | ASOR | siF7 | ||
Formula G | ASOR | sugar | ||
Formula Ha | ASOR | Cas9 | crF7-short | |
crystalization | ||||
period | ||||
Formula Hb | ASOR | Cas9 | crF7-extended | |
crystalization | ||||
Formula I | ASOR | dCas9 | crF7 | |
TABLE 3 |
Incorporation results for polynucleotide |
complexation into nanoparticle |
Protein Band | Particle Size by | Count | |
in supernatant | DLS (nm); | rate from | |
densitometry | Population | equivalent | |
Formula, Cargo | (1, FIG. 2) | volume (%) | volumes |
Ago 2 standard (0.6 ug) | 70.6 | ||
Ago 2 + excipients, | 39.2 | ||
no processing | |||
Formula A , Ago 2 | 19.6 | 2 ± 0.4 (99.8%) | 84 kHZ |
protein | |||
Form. B, RISC - 50% | 6.0 | 11 ± 2 (99.6%) | 24 kHZ |
reacted | |||
Form. C, RISC - 100% | 2.41 | 19 ± 2 (98.6%) | 26 kHZ |
reacted | |||
Form D, RISC 2RF7 - | 0.31 | 14 ± 2 (99.5%) | 18 |
100% | |||
TABLE 4 |
Densitometry for Factor VII western blotting of 7 |
70 kDa | 50 kDa | 43 kDa | ||||
Treatment | fragment | Δ % | fragment | Δ % | fragment | |
PBS |
35 ± 3 | 5 ± 0.6 | 26.3 ± 2.2 |
2 × 1.6 | mg/kg | 29 ± 2 | −17.3 | 2.5 ± 0.12 | −49.4* | 18.4 ± 1.3 | −29.8* |
2 × 160 | μg/ |
20 ± 3.7 | −42.24* | 0.72 ± 0.23 | −85.5* | 11.63 ± 2 | −55.7* |
2 × 16 | μg/kg | 20.8 ± 6.4 | −40.4 | 2.8 ± 0.25 | −44.7* | 16 ± 7.7 | −39.2 |
Notes: | |||||||
*= p < 0.5 |
TABLE 5 |
Spectral characteristics of nanoparticles and uncrystallized intermediates. |
FTIR spectrum, | FTIR spectrum, | ||||
hydrated3 | dehydrated3 | ||||
DSC Transitions1, ° C., | Delta Cp | (wavenumber, | (wavenumber, | ||
Particle/Cargo | Formula | gt midpoints, et nadirs | (J/(g*° C.)) | cm−1) | cm−1) |
Milli-Q water | ND | ND | FIG. 6 | ND | |
Hepes + 10% | et's 301.1, 315.5, | 10.828, 1.493, | FIG. 7 | FIG. 8 | |
Lactitol diluent | 335.3 | 5.175 | |||
Cs-modified | ND | ND | FIG. 9 | ND | |
lithium | |||||
ASOR ligand | ND | ND | FIG. 10 | ND | |
DMSO | ND | ND | FIG. 11 | ND | |
NH4Oac | ND | ND | FIG. 12 | ND | |
ASOR Erythritol | G | et's, 44.8, 145.6, | 0.744, 0.422, | FIG. 13 | FIG. 14 |
nanoparticle | 159.8, 183.0, 195.7, | 1.277, 0.173, | |||
288.7, 312.8 | 0.168, 0.279, | ||||
0.686 | |||||
ASOR Erythritol | G | ND | ND | ND | FIG. 15 |
micelle2 | |||||
ASOR RISC | B | et's, 40.0, 136.1, | 1.008, 1.185, | ND | FIG. 16 |
RNAi F7 | 150.2, 157.0, 167.6, | 0.972, 0.190, | |||
nanoparticle7 | 285.4, 289.0, 314.2 | 0.746, 0.029, | |||
0.652, 5.185 | |||||
ASOR RISC | C | ND | ND | ND | FIG. 17 |
RNAi F7 micelle2 | |||||
ASOR RISC | Da | ND | ND | ND | FIG. 18 |
2RF7 micelle2 | |||||
ASOR RNAi F7 | E | et's, 41.9, 307.8, | 2.383, 6.672, | ND | FIG. 19 |
nanoparticle | 329.4 | 1.400 | |||
ASOR RNAi F7 | E | ND | ND | ND | FIG. 20 |
micelle2 | |||||
ASOR Cas9 F7 | Ha | et's, 46.5, 136.0, | 3.381, 0.447, | FIG. 21 | FIG. 22 |
nanoparticle | 243.3, 305.8 | 0.899, 1.183 | |||
ASOR Cas9 F7 | Ha | ND | ND | ND | FIG. 23 |
micelle2 | |||||
ASOR dCas9 F7 | I | et's, 48.2, 312.6, | 0.680, 2.697, | ND | FIG. 24 |
nanoparticle | 329.8 | 0.494 | |||
ASOR dCas9 F7 | I | ND | ND | ND | FIG. 25 |
micelle2 | |||||
*fn1 references paragraph [00249]; | |||||
fn2 references paragraph [00250]; and | |||||
fn3 references paragraph [00251] |
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